I think I agree with you insofar as adults are concerned, but this child was not given that opportunity. This is what polio does: (https://polioeradication.org/wp-content/uploads/2016/07/unsp...). Inflicting this on a child is quite ruthless.

I don’t believe the child chose their vaccination status.

Endangering other people is not fine even if it's in your every right to do so.